Regenerative device for roentgen tubes.



v H. BAUER. REGENERATIVE DEVICE FOR ROENTGEN TUBES.

APPLICATION FILED AUG,28, 1911.

Patented Dec. 17, 1912.

v UNITED OFFICE, 3min p v p 1,047,881. U mi -m em Patented beelfvsi iimam m anin s as, iai1 semi at. 848,885.-

To all whom it may Be a known that I, Hnma 3di ital ject of the GermanEmperor, and residing at Berlin, Germany, have invented certain new anduseful Improvements in Regenerative Devices for Roentgen Tubes, of whichthe following is a speclfication.

My invention relates to regenerative devices for apparatus for producingRoentgen rays and the like.

It is well known that vacuum tubes within which electrical dischargestake place obtain owing to these continued electric discharges aconstantly higher vacuum which would finally render them unusable. Toprevent this, such vacuum tubes are provided with a regenerative deviceby which small quan-- tities of air or gas can beadmitted into thetubes. Regenerative devices used heretofore require special care inmanipulation j and, above all, the operator attending them has to be inimmediate proximity to the Roentgen tube.

Now a primary object of my mventlon is to provide a very simpleregenerative device able to be actuated from a distance.

My device comprises a column of mercury or similar liquid which is to bemoved by the pressure of air or gas, and by varylng the pressure of theair or'gas releases or closes means which are permeable to air and"indeed all gaseous and vaporous substances, but are impervious toliquids.

One illustrative embodiment of my invention is represented by way ofexample in the accompanying drawing.

Referring to the drawing, a designates a Roentgen tube into whoseevacuated chamber project the cathode 0, the anticathode d and the anode6 connected with the latter. The anode e and the cathode c are connectedby conductors f and, g with a generator of high tension current, notshown. I

The chamber 2' of the regenerative device is connected by a tube Itof'any suitable shape with the chamber 1) of the Roentgen tube. Intosaid chamber 71 projects a U-t-ube k or a tube of like shape closed atits one end at Z. Mercury or a. similar liquid is filled into the U-tubeis in such manner that a chamber nfilled with air or other gaseous bodyis formed between its one end and the end closed at Z. The open limb 0of the tube is formed as a branch 39 on which a. tube q provided with abulb 1' can be placed.

Somewhat below the level of the mercury v mercury and similar liquids.Between the twoporous stoppers is a mass u of suitable material such asgold beaters skin, metal shavings or the like.

The described apparatus operates as follows: When the vacuum has becometoo high in the chamber 1), the bulb r is pressed at any desired place.The mercury in the in the open limb of the tube this limb is providedwith a branch 8 which is "closed; both at its end located nearest thetube I0.-

into the open limb 0 is hereby caused'to sink and compresses the air orgas in the chamber n in the closed limb of the tube is. As soon as themercury has sunk so far that the porous stopper t is no longer contactedby mercury, the air or other gaseous substance in the tube 9 and thebulb r penetrat-es through the porous stopper t. The gas traverses thefiltering mass to and is here liberated from any particles of liquid ormercury which have been accidentallfcarried along. The gas purified inthis manner flows through the second porous stopper t into the interiora of the regenerative device and in this manner increases the pressurebelow atmospheric existing in the chamber 7) of the Roentgen tube a.When this pressure below atmospheric is sufiiciently increased, forwhich purpose only very small quantities of'gas or air are requisite,the bulb 1' is released whereupon the mercury or other sealing liquidemployed rises so far in the open limb 0 of the tube k that the porousstopper t is completely shut off by the liquid from the air or gaschamher in the tube 9 and its bulb 1'.

I claim 1. In apparatus for producing Roentgen rays, regenerative meanscomprising a tube closed at one end and containing a column of liquidinclosing gas at the closed end of the tube, means for producing gaspressure connected with the other end of said tube for moving the columnof liquid, and means pervious'to gases but impervious to liquids,

controlled by the column of liquid.

tube closed at one end and containing a. colunm of liquid inclosing gasat the 'closedend of the tube, means for producing gas pressureconnected with the other end of said tube for moving the column ofliquid, and means pervious to gases but impervious to liquids controlledby the column of liquid.

3. In apparatus for producing Roentgen rays, regenerative meanscomprising a bent tube closed at one end and containing a colunm ofliquid inclosing gas at the closed end of the tube, a tube provided witha bulb connected to the other end of the said bent tube, and meanspervious to gases but impervious to liquids controlled by the column ofliquid.

4:. In apparatus for producing Roentgen rays, the combination, with aRoentgen tube, having a branch, of regenerative means comprising a benttube closed at one end and containing a column of liquid inclosing gasat the closed end of the tube, means connected with the said bent tubefor moving the column of liquid, and gas-filtering means connected tothe said bent tube and in open relation with the said branch of theRoentgen tube, said filtering means bein normally sealed at one end andshut o from the said former means by the column of liquid.

5. In apparatus for producing Roentgen rays, the combination, with aRoentgen tube having a branch, of regenerative means comprising a benttube closed at one end and containing a column of liquid inclosing gasat the closed end of the tube, means connected with the said bent tubefor moving the column of liquid, and gas-filtering means comprising atube, a stopper pervious to gas and im ervious to liquid in the latter,and means or cleaning gas from liquid particles in the tube, the lattertube being connected to the said bent tube and in open relation with thesaid branch of the Roentgen tube, said filtering means being normallysealed.

at one end and shut ofif from the said former means by the column ofliquid.

6. In apparatus for producing Roentgen rays, the combination, with aRoentgen tube having a branch, of regenerative means comprising a benttube closed at one end and containing a column of liquid inclosing gasat the closed end of the tube, means connected with the said bent tubefor moving the column of liquid, and gas-filtering means comprising atube, a stopper pervious to gas and impervious to liquid in each end ofthe latter, and means for drying gas between the stoppers, the lattertube being connected to the said bent tube and in open relation with thesaid branch of the Roentgen tube, said filtering means being normallysealed at one end and shut off from the said former means by the columnof liquid.

7. In apparatus for producing Roentgen rays, the combination, with aRoentgen tube having a branch, of regenerative means comprising a benttube closed at one end and containing a column of liquid inclosing gasat the closed end of the tube, means connected with the said bent tubefor moving the column of liquid, and gas-filtering means comprising atube, a stopper pervious to gas and impervious to liquid in each end ofthe latter, and gold boaters skin between the stoppers, the latter tubebeing connected to the said bent tube and in open relation with the saidbranch of the Roentgen tube, said filtering means being normally sealedat one end and shutofi from the said former means by the column ofliquid.

In testimony whereof, I afiix my signature in the presence of twowitnesses.

HEINZ BAUER. Witnesses:

HENRY HABPER,

BRUNO A. BRUCE.

